adallak Posted November 18, 2010 Report Share Posted November 18, 2010 My Fleetwood acts up. This is the second time the both cooling fans turn on and an EGR related code is set. The engine does not even reach the operational temperature when it happens. No other codes, just the EGR. What's going on? The saddest thing in life is wasted talent Link to comment Share on other sites More sharing options...
Cadillac Jim Posted November 18, 2010 Report Share Posted November 18, 2010 The OBD I codes I have for EGR are: P036 (E036) EGR Valve Pintle Position Out of Range P048 (E048) Exhaust Gas Recirculation (EGR) system Problem I think the first thing to check is the battery cable and the grounds, and, of course, the battery condition. -- Click Here for CaddyInfo page on "How To" Read Your OBD Codes-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data -- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC Yes, I was Jims_97_ETC before I changed cars. Link to comment Share on other sites More sharing options...
BodybyFisher Posted November 18, 2010 Report Share Posted November 18, 2010 Adallak, I looked through my 94 FSM, and I don't see any direct association but I am still looking. I looked at electrical and need to go out to the garage to get the engine book (section 6) The cooling fans don't share a common ground with anything related to engine controls Your EGR is vacuum operated via an EGR solenoid is my memory correct. You might look at occurances that cause the both fans to run, for instance, when the coolant hits a specified temp, both fans will be commanded or the AC going on, etc.. Ill look to see if the EGR is circuitry is explained more clearly in the other manual. It may just be a coincidence, but it would be an odd one to occur twice Maybe your PCM is deflubiating.... try a TAP test Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
adallak Posted November 19, 2010 Author Report Share Posted November 19, 2010 Thank you for the replies, gents. Just want to remind that this is 1995 Fleetwood with 5.7 liter engine. This is really strange, because it happens in about a minute after I start the engine and drive to the local tracks to exercise. That said, the coolant should be below the operational temperature. The temp sensor may act up, but I really doubt that EGR has anything to do with temperature reading. The code is 32. E32 on my 91 Seville has a different meaning. Probably other Cadillacs with OBD1 differ as well. The saddest thing in life is wasted talent Link to comment Share on other sites More sharing options...
BodybyFisher Posted November 19, 2010 Report Share Posted November 19, 2010 Opps, I confuse the Deville and the Fleetwood mechanically. Is there a separate manual for the Fleetwood?, or does my manual cover it also? I have a 94 manual for the deville, deville concours, eldo and seville. It is an odd problem, it appears related, but it shouldn't be related at all. I am not sure if I can help if my manual is wrong. I would look for common grounds and power sources. But something is commanding the fans to on below normal operating temp that somehow may affect the EGR What EGR code are you getting (the meaning) Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
adallak Posted November 19, 2010 Author Report Share Posted November 19, 2010 Opps, I confuse the Deville and the Fleetwood mechanically. Is there a separate manual for the Fleetwood?, or does my manual cover it also? I have a 94 manual for the deville, deville concours, eldo and seville. It is an odd problem, it appears related, but it shouldn't be related at all. I am not sure if I can help if my manual is wrong. I would look for common grounds and power sources. But something is commanding the fans to on below normal operating temp that somehow may affect the EGR What EGR code are you getting (the meaning) Mike, the Fleetwoods are very different code-wise. The code is set (per FSM) when PCM does not detect at least 1.3 kPa change in MAP when it commands EGR "ON" within 1.5 sec of the test. I do not see how it can be associated with fans. I will clean the EGR solenoid connector again tomorrow and see if it helps... Cannot come up with something else at the moment. The EGR passages are clean and the EGR valve was replaced only 5,000 miles ago. It is clearly an electrical problem. Made a 30 mile trip yesterday with no problem. The saddest thing in life is wasted talent Link to comment Share on other sites More sharing options...
Cadillac Jim Posted November 19, 2010 Report Share Posted November 19, 2010 My only OBD I code 032: P032 (E032) Open MAP Sensor Signal My only OBD II code 0032: P0032 Heated Oxygen Sensor (HO2S) Heater Circuit High Voltage Bank 1 Sensor 1 That's why I was thinking that it was as spurious electrical code. If the battery ground cable is flaky, or an engine ground strap is bad, you can get voltage fluctuations. Whenever I see weird codes and behavior not related to them, I think voltage fluctuations. The most likely ways that the temperature could really be doing this as you describe is if the thermostat is sticking or you are low on coolant. -- Click Here for CaddyInfo page on "How To" Read Your OBD Codes-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data -- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC Yes, I was Jims_97_ETC before I changed cars. Link to comment Share on other sites More sharing options...
rockfangd Posted November 19, 2010 Report Share Posted November 19, 2010 I would be starting with the coolant temp sensor, maybe defaulting kind of like a limp mode GM FAN FOREVER Nice, clean, luxury= fine automobile Link to comment Share on other sites More sharing options...
adallak Posted November 19, 2010 Author Report Share Posted November 19, 2010 My only OBD I code 032: P032 (E032) Open MAP Sensor Signal My only OBD II code 0032: P0032 Heated Oxygen Sensor (HO2S) Heater Circuit High Voltage Bank 1 Sensor 1 That's why I was thinking that it was as spurious electrical code. If the battery ground cable is flaky, or an engine ground strap is bad, you can get voltage fluctuations. Whenever I see weird codes and behavior not related to them, I think voltage fluctuations. The most likely ways that the temperature could really be doing this as you describe is if the thermostat is sticking or you are low on coolant. Here is howFleetwood's codes look like. I have got 00-32 code current. The saddest thing in life is wasted talent Link to comment Share on other sites More sharing options...
BodybyFisher Posted November 19, 2010 Report Share Posted November 19, 2010 Adallak, read up on the section on your coolant fans, the default for a bad coolant temp sensor might turn on both fans 'for safety' Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
BodybyFisher Posted November 19, 2010 Report Share Posted November 19, 2010 See this http://en.allexperts.com/q/Cadillac-Repair-806/2008/2/95-Cadillac-Fleetwood-running.htm Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
adallak Posted November 19, 2010 Author Report Share Posted November 19, 2010 See this http://en.allexperts.com/q/Cadillac-Repair-806/2008/2/95-Cadillac-Fleetwood-running.htm Thanks Mike. Today I cleaned the EGR solenoid connector and temperature sensor connectors. The problem is intermittent and can drive me nuts. Probably EGR code defaults the PCM to open loop. The presence of the SES light probably turns the both fans "ON" just in case. I'll test the coolant temperature sensor within a couple of days, but am sure if it were bad I would get a lot more drivability problems. Thanks again. The saddest thing in life is wasted talent Link to comment Share on other sites More sharing options...
adallak Posted November 30, 2010 Author Report Share Posted November 30, 2010 UPDATE. I cannot emphasize enough the importance of cleaning connectors BEFORE doing anything else! Usually we get a trouble code, go to parts store, buy a new part without testing the old one, install it and ... everything is fine. Conclusion? The old part was bad... Wrong! The old part might be just fine , but the connection cleaned itself mechanically when you disconnected and reconnected it. There is somewhere a thread started by me where I described how I replaced two perfectly working washer pumps before I figured out the connector was bad. Disconnecting and reconnecting just a couple of times may or may not work, or will work for a while. That's exactly what happened to my EGR solenoid connector. ONLY after cleaning the both parts of it with some WD-40 and connecting/reconnecting some 20 times, the EGR code, SES defaulting to turning the both cooling fans ON, went away. Thank you, bad washer pump connector. You helped me to fix another problem. The saddest thing in life is wasted talent Link to comment Share on other sites More sharing options...
Ranger Posted November 30, 2010 Report Share Posted November 30, 2010 This stuff may work better than WD40 for this application. http://store.caig.com/s.nl/sc.2/category.188/.f Link to comment Share on other sites More sharing options...
adallak Posted November 30, 2010 Author Report Share Posted November 30, 2010 This stuff may work better than WD40 for this application. http://store.caig.com/s.nl/sc.2/category.188/.f Looks like a good stuff. Thanks Ranger. The saddest thing in life is wasted talent Link to comment Share on other sites More sharing options...
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